CVE-2026-53599 — Vulnerability intelligence
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Published:
- CVSS
- 7.5
- CISA KEV
- Not listed; not proof of no exploitation
Original source text (not a translation)
REDAXO is a PHP-based content management system. From 5.18.2 until 5.21.1, rex_mediapool::isAllowedExtension in redaxo/src/addons/mediapool/lib/mediapool.php lets an authenticated backend user with media[upload] permission upload a JPEG/PHP polyglot named shell.php.any.jpg, which web servers with multi-extension PHP handlers can execute as the web-server user. This issue is fixed in version 5.21.1.